/Engine/Source/Runtime/MediaUtils/Public/MediaPlayerFacade.h
Query the time ranges of cached media samples for the specified caching state.
void QueryCacheState ( EMediaTrackType TrackType, EMediaCacheState State, [TRangeSet](API\Runtime\Core\Math\TRangeSet)< [FTimespan](API\Runtime\Core\Misc\FTimespan) > & OutTimeRanges ) const